We just put one on my buddies '06 Mega Dually 4wd, stacked with a smarty on level 3x2.
We started with the tst on 0 and smarty on lvl9, impressive, but then we cranked up the tst to 3x2.
The only mods to this truck are AFE stg2, and straight pipe, otherwise stock. Sorry, no gauges,, those are going on tuesday.
From a dead stop, and WOT, the truck pulls hard and is rolling smoke for about 5', then it spins all four rear tires for about 15', and it's 65MPH before you can even take it all in...
Makes my twin turbo 6-speed feel,, slowwwww.LOL.
It slips the transmission bad. The truck was holding 2,900RPM from 65MPH to 85MPH.
Soon, trans upgrades and a fuel pump...
Merrick